CN106405359A - Insulating oil test oil cup for 100 kV pulse voltage - Google Patents

Insulating oil test oil cup for 100 kV pulse voltage Download PDF

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Publication number
CN106405359A
CN106405359A CN201611012395.2A CN201611012395A CN106405359A CN 106405359 A CN106405359 A CN 106405359A CN 201611012395 A CN201611012395 A CN 201611012395A CN 106405359 A CN106405359 A CN 106405359A
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China
Prior art keywords
anode
cover plate
negative electrode
mating surface
lubricating cup
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Pending
Application number
CN201611012395.2A
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Chinese (zh)
Inventor
范红艳
刘胜
李鹏辉
王俊杰
孙旭
王利民
潘亚峰
王刚
樊旭亮
林强
郭旭
牛耀辉
赵健
唐小宇
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Northwest Institute of Nuclear Technology
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Northwest Institute of Nuclear Technology
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Application filed by Northwest Institute of Nuclear Technology filed Critical Northwest Institute of Nuclear Technology
Priority to CN201611012395.2A priority Critical patent/CN106405359A/en
Publication of CN106405359A publication Critical patent/CN106405359A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/16Construction of testing vessels; Electrodes therefor

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

The invention discloses an insulating oil test oil cup for 100 kV pulse voltage. A sealed cavity is formed by a cathode cover plate, a cylindrical insulation shell and an anode cover plate. A cathode is threadingly connected to the cathode cover plate, and an anode is threadingly connected to the cathode cover plate. The right end of the anode electrode is connected to an electric contact copper electrode. The oil cup is fixed to a switch cathode as a whole body through the thread on the cathode cover plate, and wire voltage introduction is formed. The contact type soft connection between the anode and a switch anode are realized through the electric contact copper electrode, and the assembly and disassembly are convenient. According to the insulating test oil cup, a large-gap large area electrode is employed, the microsecond level pulse voltage provided by a formation wire can be directly applied to carry out a test, the voltage withstand ability reaches 600kV, the distance between two electrodes is easy to adjust, and the insulating oil voltage withstand test in a vacuum environment or high pressure gas environment can be carried out.

Description

A kind of insulation oil test lubricating cup for hundred kilovolts of pulse voltages
Technical field
The invention belongs to technical field of pulse power, it is related to a kind of oil of the insulation oil test for hundred kilovolts of pulse voltages Cup.
Background technology
In common capacitor type pulse power driving source, it is the most frequently used high-voltage energy storage, pulse that coaxial pulse forms line Shaping unit part.Pulse-forming line widely uses transformer oil, glycerine, deionized water, capacitor oil, castor oil, ethylene glycol Fill with to carry out insulating Deng insulating oil, energy storage or shaping pulse.In the design process of pulse-forming line, need according to insulating oil Oil clearance puncture data obtain insulating oil disruptive field intensity, thus carrying out redundant safety design.
Typically voltage-withstand test is carried out to insulating oil using standard oil cup.With reference to Fig. 1, the insulation oil ga(u)ge commonly used in the market Using ceramic cup 1, cup wall opposite ends are provided with copper electrode 3 to quasi- lubricating cup, and the guide rod of copper electrode 3 is polished rod, and needs are used tight Determine screw 4 that copper electrode 3 is fixed.A diameter of 25mm of copper electrode, between electrode, spacing is 2.5mm.Generally voltage-withstand test Lubricating cup is mainly used in the industries such as high pressure, electric power electric, in experiment using exchange 50/60Hz or DC voltage to lubricating cup electrode Gap carries out charging battery, thus obtaining the oily pressure voltage of test.Experiment is typically carried out under atmospheric pressure environment, and ceiling voltage is general not More than 80~100kV.
From unlike above test condition, the charging interval of current pulse-forming line is generally 10~100us magnitude, electricity Press as hundreds of kV~MV, insulation distance is also much larger than 2.5mm.
For liquid insulating medium, the formula approximate representation of breakdown field strength is:Wherein, Ebr For disruptive field intensity, MV/cm;A is the part electrode area of its electric field and the deviation no more than 10% of maximum field on electrode, cm2;T is effective time, μ s, is defined as reaching the time of maximum field 63%, and k is constant.By formula it can be deduced that insulating oil The size of oil clearance breakdown voltage and sample, electrode gap and charging modes (pulse charge pressure voltage is higher) related.Work as design During size several magnitude bigger than test sample, the deviation of data that it is pressure is larger.The electrode disk of existing voltage-withstand test lubricating cup is straight Footpath and oil clearance spacing are too small, and the breakdown voltage value that test obtains is too low, with the actual size forming line or actual pressure environment contracting Bigger than too, therefore, existing voltage-withstand test lubricating cup can not provide effectively reliable data for the design of Large-scale High-Pressure pulse-forming line Support.
Content of the invention
Present invention solves the problem in that providing a kind of insulation oil test lubricating cup for hundred kilovolts of pulse voltages, this lubricating cup The Microsecond grade pulse voltage forming line offer can be directly applied to be tested, voltage is up to hundreds of kV.
The technical solution of the present invention is to provide a kind of insulation oil test lubricating cup for hundred kilovolts of pulse voltages, including Negative electrode, anode and cavity, it is particular in that:
The end face external diameter of above-mentioned negative electrode and anode is all higher than 100mm;The electric-field enhancing cylindrical in order to weaken electrode end surface, on State negative electrode end face and anode end face is respectively provided with field intensity and homogenizes ring.
Above-mentioned cavity is seal cavity, is arranged on transparent tubular including transparent tubular insulation cover, by removably The negative electrode cover plate at insulation cover two ends and anode cover plate, above-mentioned negative electrode is arranged on negative electrode cover plate;Above-mentioned anode is arranged on anode On cover plate;Above-mentioned lubricating cup cavity is provided with valve.
Preferably, above-mentioned negative electrode and anode end face external diameter are 10~20 with the ratio of the distance between negative electrode and anode.
In order to realize negative electrode and good coaxial of anode, above-mentioned negative electrode has negative electrode mating surface and perpendicular positioning ring, above-mentioned Anode has anode mating surface, and above-mentioned negative electrode cover plate has the first mating surface and the second mating surface, and above-mentioned anode cover plate has Three mating surfaces and the 4th mating surface, the screw thread at above-mentioned transparent tubular insulation cover two ends is respectively provided with outer cover mating surface one and outer cover Mating surface two;
Above-mentioned negative electrode mating surface and the first mating surface coaxial cooperation of negative electrode cover plate;Above-mentioned anode mating surface and anode cover plate The 3rd mating surface coaxial cooperation;Above-mentioned outer cover mating surface one and outer cover mating surface two the second mating surface with negative electrode cover plate respectively The 4th mating surface coaxial cooperation with anode cover plate.
In order to adjust the distance between two electrodes, it is additionally provided between above-mentioned anode cover plate and anode and is available for anode axially The annular groove of movement.
In order to lubricating cup of the present invention is directly connected with the switch segment electrode of driving source, above-mentioned anode switchs the company of anode with the external world Connect end and be provided with electrical contact copper-base.
Above-mentioned electrical contact copper-base is made using the thick red copper of 0.2~0.5mm, and end is dome structure.
The material of above-mentioned negative electrode cover plate and anode cover plate is stainless steel or other conductive materials.
For the ease of assembling, above-mentioned negative electrode and negative electrode cover plate are threaded connection;Described anode and anode cover plate pass through spiral shell Line connects;Described negative electrode cover plate, anode cover plate are all connected with transparent tubular insulation cover by screw thread;Described transparent tubular insulation The material of outer cover is lucite.
The invention has the beneficial effects as follows:
(1) provided by the present invention for the insulation oil test lubricating cup of hundred kilovolts of pulse voltages, using long gap large area electricity Pole, voltage endurance capability may be up to 600kV, thus the test voltage of insulating oil and the contracting ratio of real work voltage can be reduced, makes pressure Test data is relatively reliable effectively.
(2) provided by the present invention for the insulation oil test lubricating cup of hundred kilovolts of pulse voltages, capacitor type arteries and veins can be installed to The switch segments rushing power drive source are tested, because its Microsecond grade pulse voltage that directly application formation line charges carries out reality Test, the experimental result therefore obtaining is higher for the insulating Design reference value of driving source.
(3) provided by the present invention for the insulation oil test lubricating cup of hundred kilovolts of pulse voltages, lubricating cup is sealing structure, oil cover Inside and outside bear pressure reduction, lubricating cup can be vacuumized and reinject insulating oil, also can inject the insulating gas such as high pressure nitrogen, carry out height The insulating oil voltage resistant test calmed the anger under body.
(4) provided by the present invention for insulation oil test lubricating cup, negative electrode cover plate and the anode cover plate of hundred kilovolts of pulse voltages All made using metal, it is connected with the switch segment electrode of driving source, directly can introduce pulse voltage, eliminate voltage and draw The links such as the electric wire connection entering.
(5) provided by the present invention for the insulation oil test lubricating cup of hundred kilovolts of pulse voltages, between negative electrode and anode away from From can easily be accommodated, various sizes of long gap insulating properties test can be carried out, the experimental data under different gap is carried out mutually Contrast is revised, and to obtain more accurate insulating oil voltage resistant value, this lubricating cup electrode gap adjustable range is 7~15mm.
(6) provided by the present invention for the insulation oil test lubricating cup of hundred kilovolts of pulse voltages, in transparent tubular insulation cover Two ends are designed with outer cover mating surface, are coaxial in order to realize the high accuracy of negative electrode cover plate and anode cover plate, negative electrode is joined by negative electrode Conjunction face and the realization of negative electrode cover plate are coaxial, and anode passes through anode mating surface and the realization of anode cover plate is coaxial, thus finally realizing negative electrode Well coaxial with anode, with avoid negative electrode and anode not coaxially the impact to Electric Field Distribution it is ensured that the standard of voltage-withstand test result Really property.
(7) provided by the present invention for the insulation oil test lubricating cup of hundred kilovolts of pulse voltages, anode is adopted with switch positive plate The mode being flexible coupling with contact, is convenient to mount and dismount.
Brief description
Fig. 1 is the structural representation of working standard lubricating cup in prior art;
Fig. 2 is the structural representation of the present invention;
Fig. 3 is installed to the structural representation of driving source breaker in middle section for the present invention;
Fig. 4 is the Local map at negative electrode of the present invention and negative electrode cover plate mating surface;
Fig. 5 is the Local map at anode of the present invention and anode cover plate mating surface;
Fig. 6 is the Local map at negative electrode cover plate of the present invention and lucite outer cover mating surface.
Wherein, 1- pottery cup, 2- electrode tip holder, 3- copper electrode, 4- holding screw;5- negative electrode sealing ring, 6- negative electrode cover plate, 7- outer cover sealing ring one, 8- negative electrode, 9- anode, 10- transparent tubular insulation cover, 11- outer cover sealing ring two, 12- anode cover plate, 13- lower valve, 14- electrical contact copper-base, 15- anode seal circle, the upper valve of 16-, 17- formation line outer tube, 18- insulation support plate, 19- switch segments outer tube, 20- gripper shoe, 21- transmission line outer tube, 22- switchs negative electrode, and 23- switchs anode;601- first mating surface, 602- second mating surface;801- negative electrode mating surface, 802- perpendicular positioning ring, 803- negative electrode end face, 804- field intensity homogenizes ring one; 901- anode mating surface, 902- anode screw thread, 903- anode end face, 904- field intensity homogenizes ring two;1001- outer cover mating surface one, 1002- outer cover mating surface two;1201- the 3rd mating surface, 1202- annular groove, 1203- the 4th mating surface.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Referring to Fig. 2, lubricating cup of the present invention, including negative electrode 8, anode 9, transparent tubular insulation cover 10, negative electrode cover plate 6, negative electrode Sealing ring 5, outer cover sealing ring 1, outer cover sealing ring 2 11, anode cover plate 12, anode seal circle 15, electrical contact copper-base 14, on Valve 16, lower valve 13.Transparent tubular insulation cover 10 is cylindrical shape, negative electrode cover plate 6, lucite outer cover 10 and anode cover plate 12 composition one closing lubricating cup cavitys, negative electrode cover plate 6 and anode cover plate 12 are threadedly secured to transparent tubular insulation cover 10 Two ends, and sealed by outer cover sealing ring 1 and outer cover sealing ring 2 11 respectively at transparent tubular insulation cover 10 two ends. Negative electrode 8 is to threaded with negative electrode cover plate 6, and anode 9 is to threaded with anode cover plate 12.Anode cover plate 12 is provided with valve 16 and lower valve 13, the effect of this two valves has at 2 points:One injection that can be used for insulating oil and discharge, two is can be right Lubricating cup is vacuumized or is injected gases at high pressure.
With reference to Fig. 2, anode 9 right-hand member is connected with electrical contact copper-base 14, and electrical contact copper-base 14 adopts the thick purple of 0.2~0.5mm Copper or other good conductive materials are made, and end is dome structure, has certain elasticity.
With reference to Fig. 3, described lubricating cup as entirely through being threadedly secured on extraneous switch negative electrode on negative electrode cover plate 6, Line voltage will be formed introduce.When the switch segments outer tube of pulse power driving source is taken apart, lubricating cup is arranged on switch negative electrode, anode 9 is hanging;When switch segments outer tube is connected with transmission line portions closure, anode 9 and switch anode pass through electrical contact copper-base 14 and enter Row electrical connection, electrical contact copper-base 14 end can be compressed, and is flexible coupling for contact with switch anode, thus Convenient switch section outer tube Connection, and ensure that anode with switch anode excellent electric contact.
Specifically, with reference to Fig. 2 and Fig. 4, negative electrode 8 and negative electrode cover plate 6 are using threadeding, and threaded cannot realize relatively High axiality, therefore, negative electrode 8 has negative electrode mating surface 801, its with negative electrode cover plate 6 on the first mating surface 601 pass through high-precision Degree matching relationship carries out coaxial cooperation, to realize the well coaxial of negative electrode 8 and negative electrode cover plate 6;Sealed with negative electrode at two mating surfaces Circle 5 is sealed;Negative electrode 8 is fixed installation, irremovable in front and back;Perpendicular positioning ring 802 is additionally provided with negative electrode 8, its effect is Keep good perpendicularity, the end that perpendicular positioning ring 802 is contacted with negative electrode cover plate 6 in order to ensure negative electrode draws bar with negative electrode cover plate 6 Face is concordant.
With reference to Fig. 2 and Fig. 5, anode 9 is also adopted with anode cover plate 12 threadeds it is impossible to realize higher axiality.Cause This, anode 9 is also configured with anode mating surface 901, and it passes through to join in high precision with the 3rd mating surface 1201 on anode cover plate 12 Conjunction relation carries out coaxial cooperation, to realize the well coaxial of anode 9 and anode cover plate 12;With anode seal circle 15 at two mating surfaces Sealed;Anode 9 can be moved forward and backward by anode screw thread 902, adjusts spacing between two electrodes, in this lubricating cup between two electrodes It is 7~15mm away from scope;Annular groove 1202 is had on anode cover plate 12, to reserve mobile space to when adjusting before and after anode 9.
Negative electrode 8 and anode 9 are broad-area electrode, and negative electrode end face 803 and anode end face 903 external diameter, in more than 100mm, belong to In broad-area electrode.Electrode external diameter is 10~20 with the ratio of electrode spacing.Field intensity is had to homogenize ring 1 on negative electrode end face 803, sun Field intensity is had to homogenize ring 2 904, to weaken the electric-field enhancing of electrode end surface on extreme face 903.
With reference to Fig. 2 and Fig. 6, described negative electrode cover plate 6 and anode cover plate 12 are all threadedly secured to transparent tubular insulation On outer cover 10, the high accuracy in order to realize negative electrode cover plate 6 and anode cover plate 12 is coaxial, the spiral shell at transparent tubular insulation cover 10 two ends Line is respectively provided with outer cover mating surface 1 and outer cover mating surface 2 1002, in outer cover mating surface 1 and negative electrode cover plate 6 Second mating surface 602 is connected, and outer cover mating surface 2 1002 is carried out with the 4th mating surface 1203 on anode cover plate 12 It is connected;Additionally, negative electrode 8 passes through negative electrode mating surface 801 and negative electrode cover plate 6 realizing coaxial, anode 9 is by anode mating surface 901 with anode cover plate 12 realize coaxial, thus finally realizing the well coaxial of negative electrode 8 and anode 9;By perpendicular positioning ring 802 Guarantee the perpendicularity of negative electrode 8, guarantee the perpendicularity of anode 9 by longer mating surface, thus finally realizing negative electrode end face 803 The depth of parallelism with anode end face 903.By high accuracy mating surfaces at different levels and perpendicular positioning ring, realize negative electrode end face and anode end face Well coaxial and parallel, to avoid the not coaxial or not parallel impact to Electric Field Distribution.
The material of negative electrode cover plate 6 and anode cover plate 12 is stainless steel or other conductive materials, that is, as structural member and driving The switch segment electrode in source is connected, and also serves as voltage lead-in and directly introduces pulse voltage, eliminates the electric wire of voltage introducing The links such as connection.

Claims (8)

1. a kind of insulation oil test lubricating cup for hundred kilovolts of pulse voltages, including negative electrode, anode, lubricating cup cavity, is arranged on oil Cup cavity in insulating oil it is characterised in that:
The end face external diameter of described negative electrode and anode is all higher than 100mm;Described negative electrode end face and anode end face are respectively provided with field intensity and homogenize Ring;
Described cavity is seal cavity, is arranged on transparent tubular insulation including transparent tubular insulation cover, by removably The negative electrode cover plate at outer cover two ends and anode cover plate, described negative electrode is arranged on negative electrode cover plate, and described anode is arranged on anode cover plate On;
Described lubricating cup cavity is provided with valve.
2. the insulation oil test lubricating cup for hundred kilovolts of pulse voltages according to claim 1 it is characterised in that:Described the moon Pole and anode end face external diameter are 10~20 with the ratio of the distance between negative electrode and anode.
3. according to the arbitrary described insulation oil test lubricating cup for hundred kilovolts of pulse voltages of claim 1-2 it is characterised in that: Described negative electrode has negative electrode mating surface and perpendicular positioning ring, and described anode has anode mating surface, and described negative electrode cover plate has One mating surface and the second mating surface, described anode cover plate has the 3rd mating surface and the 4th mating surface, described transparent tubular insulation The screw thread at outer cover two ends is respectively provided with outer cover mating surface one and outer cover mating surface two;
Described negative electrode mating surface and the first mating surface coaxial cooperation of negative electrode cover plate;Described anode mating surface and the of anode cover plate Three mating surface coaxial cooperation;Described outer cover mating surface one and outer cover mating surface two the second mating surface and the sun with negative electrode cover plate respectively 4th mating surface coaxial cooperation of polar cap plate.
4. the insulation oil test lubricating cup for hundred kilovolts of pulse voltages according to claim 3 it is characterised in that:Described sun It is additionally provided with the annular groove being available for anode axial movement between polar cap plate and anode.
5. the insulation oil test lubricating cup for hundred kilovolts of pulse voltages according to claim 3 it is characterised in that:Described sun Pole is provided with electrical contact copper-base with the connection end of extraneous switch anode.
6. the insulation oil test lubricating cup for hundred kilovolts of pulse voltages according to claim 5 it is characterised in that:Described Electrical contact copper-base is made using the thick red copper of 0.2~0.5mm, and end is dome structure.
7. the insulation oil test lubricating cup for hundred kilovolts of pulse voltages according to claim 1 it is characterised in that:Described The material of negative electrode cover plate and anode cover plate is stainless steel or other conductive materials.
8. the insulation oil test lubricating cup for hundred kilovolts of pulse voltages according to claim 1 it is characterised in that:Described the moon Pole and negative electrode cover plate are threaded connection;Described anode and anode cover plate are threaded connection;Described negative electrode cover plate, anode cover plate All it is connected with transparent tubular insulation cover by screw thread;The material of described transparent tubular insulation cover is lucite.
CN201611012395.2A 2016-11-17 2016-11-17 Insulating oil test oil cup for 100 kV pulse voltage Pending CN106405359A (en)

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CN108539581A (en) * 2018-05-23 2018-09-14 西北核技术研究所 A kind of Metal Substrate graphene film cathode gas spark switch
CN108919077A (en) * 2018-08-13 2018-11-30 清华大学深圳研究生院 A kind of Hi-pot test device of insulating materials
CN111190082A (en) * 2020-01-09 2020-05-22 华北电力大学 Liquid steam dielectric strength testing arrangement

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CN108539581B (en) * 2018-05-23 2020-06-26 西北核技术研究所 Metal-based graphene film cathode gas spark switch
CN108919077A (en) * 2018-08-13 2018-11-30 清华大学深圳研究生院 A kind of Hi-pot test device of insulating materials
CN111190082A (en) * 2020-01-09 2020-05-22 华北电力大学 Liquid steam dielectric strength testing arrangement

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